Improvement in road-scrapers



L. P. WRIGHT. Road-Scrapers.

Patented'May 20,1873.

IIIIIIIIIH IUI ' Wkmessas AM, Pharm/mammie ca Mmosaamsfs mams) NITEDSTATES PATENT OFFICE.

LEVI P. WRIGHT, on CHICAGO, ILLINOIS.

IMPRQVEMENT IN ROAD-SCRAPERS.

Specification forming part of Letters Patent No. 139,099, dated May 20,1873 application filed October 11, 1872.

To all rwhom it may concern:

Be it known that I, LEVI P. WRIGHT, of the city of Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Street-Scrapers,

of which the following is a full description,

reference being had to the accompanying drawing making a part of thisspecification, in which- Figure 1 is a sideview Fig. 2, a top or planview with a part of the drivers platform cut away; and Fig. 3, a detailof the device for holding the scraper-board when elevated.

This invention is an improvement on the street-scraper patented to J. K.Thompson September 14, 1869; and its nature consists in a newcombination and arrangement of the parts for holding the scraper-boardin position, and for raising and lowering it.

In the drawing, A is the frame, mounted upon suitable wheels and axles;B, a secondary frame, which supports the several plates or sections thatcolnpose the scraper; C, scraper; D, driveis seat; E, platform c,crossheads permanently attached to the secondary frame B; b, rodspassing through the crossheads a; c, braces supporting the rods b attheir lower ends and holding them in position; d, connection of thebraces with the rods b,- e, rods supporting the several sections of thescraper C and connecting them with the frame B; j', handles by which thedriver raises the scraper; g, pawl pivoted to the handles f, andengaging with a ratchet-Wheel permanently attached to the shaft Z,- L,pawl engaging with the ratchet-wheel p at the opposite end of the shaftl for holding vthe scraper when elevated; t', chain-Wheels; j, chainattached to the wheels i and the frame B; k, friction-wheels over whichthe chains j pass; l, cross-shaft to which the ratchet devices areconnected; m, rod or shaft located under the platform E; a, footleverprojecting through the platform E o, Fig. 3, projection on the rod orshaft m, and located directly under the pawl h, so that the driver, bypressing his foot against the lever a, disengages the pawl h for thepurpose of lowering the scraper; p, ratchet-wheel which engages with thepawl h; q, head-blocks attached to the frame a' for supporting the upperends of the rods b. The scraper-board G is made in sections, whicharefsupported upon rods and held in place by springs or Weights similarto the board shown in the said Thompsons patent.

In order to have the scraper, with its frame B, play freely up and down,I have found it necessary to support it on both sides. In order to dothis, I attach the cross-heads a to this frame B, which said cross-headsplay freely on the rods b, which are located both in front and rear, asshown. The braces c hold these rods b firmly in position, and, beinglocated on both sides ofthe scraper, the scraper plays freely up anddown as a whole, while the sections of the board C conform to the crownof the street and to the inequalities ofthe surface. The friction-wheelslc hold the rear ends of the chains in line with the rods b, so that thescraper, as a whole, can be easily raised and carried on the frame a.

The chains j are attached at the front ends to the wheels i on the shaftl. This shaft is revolved by means of the lever f, which, as shown, is atriple lever, but may, however, be made single, if desired. It isloosely connected to the shaft l, on which it moves as a center. The dogor pawl gis attached to the lever, and the driver, by pulling the leverf, revolves the shaft l, and winds up the chains by means of this dog orpawl q connecting with a ratchet-Wheel on said shaft. In order to/disengage the chains so as to drop the scraper, the driver presses hisfoot againt the short lever a, which throws back the locking dog or pawlh.

What I claim as new is as follows:

1. The combination of the supporting-rods b with the braces c, secondaryframe B, and cross-heads a, substantially as specified.

2. The combination of the foot-lever a with the shaft or rod m andprojections o for disengaging the pawl h, substantially as specified.

LEVI P. WRIGHT.

Witnesses:

E. A. WEST, 0. W. BOND.

